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以某独斜塔双索面弯斜拉桥为例建立空间梁格模型,分析了该桥几何位置迁移、拉索垂度效应、支座脱空等主要非线性特征的影响程度,并提供了处理施工中临时支架脱空引起特殊非线性问题的程序迭代计算方法;在此基础上以主塔应力安全为主线,兼用传统正装分析的方法,综合考虑各种非线性以及徐变收缩等问题设计了整个体系转换的施工过程。实测结果表明:该梁格模型的建立以及对特殊非线性问题的处理方法为该桥的施工设计与监控提供了准确的数据,保证了体系转换施工的顺利完成,可供同类异形斜拉桥的施工模拟计算参考。
Taking a single inclined plane cable-stayed bridge as an example, a space girder lattice model is established, and the influence degree of the main nonlinear characteristics such as geometric location migration, cable sag effect and bearing emptying is analyzed. Based on this, taking the main tower stress safety as the main line, and using the traditional formal wear analysis method, considering all kinds of nonlinear and creep shrinkage and other issues design The entire system conversion of the construction process. The experimental results show that the establishment of the beam model and the treatment of special nonlinear problems provide accurate data for the construction design and monitoring of the bridge, and ensure the successful completion of the system conversion construction, which can be used for the similar shaped cable-stayed bridge Construction simulation calculation reference.